1340440140 has 96 divisors (see below), whose sum is σ = 4279746240. Its totient is φ = 310542336.

The previous prime is 1340440121. The next prime is 1340440151. The reversal of 1340440140 is 410440431.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37285 + ... + 63804.

It is an arithmetic number, because the mean of its divisors is an integer number (44580690).

Almost surely, 2^1340440140 is an apocalyptic number.

1340440140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1340440140 is an abundant number, since it is smaller than the sum of its proper divisors (2939306100).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1340440140 is a wasteful number, since it uses less digits than its factorization.

1340440140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101131 (or 101129 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 1340440140 is about 36612.0217961259. The cubic root of 1340440140 is about 1102.5944654018.

Adding to 1340440140 its reverse (410440431), we get a palindrome (1750880571).

The spelling of 1340440140 in words is "one billion, three hundred forty million, four hundred forty thousand, one hundred forty".